Improvement in machines for rolling scythes



2 Sheets-Sheet L H. WATERS. Machines for Rolling Scythes..

Patented April 8, 18731.

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H. WATER S.

Machines for Rolling Scythes.

No.137,741, PatentedApril8,l8F3.

771711685615. fiwezviiw:

UNITED STATES ATENT QFFICE.

HERVEY WATERS, OFNORTHBRIDGE, MASSACHUSETTS.

IMPROVEMENT IN MACHINES FCR ROLLING SCYTHES.

Specification forming part of Letters Patent No. 137,741, dated April 8,1573; application filed February 13, 1865. v

To all whom it may concern:

Be it known that I, HERVEY WATnRs, of Northbridge, county of Worcesterand State of Massachusetts, have invented an Improved Suit ofRoller-Dies; and I do hereby declare that the following, taken inconnection with the drawing which accompanies and forms part of thisspecification, is a description of myjnvention sufficient to enablethose skilled in the art to practice it.

To be able to manufacture that class of scythes which have their backssolid with their webs mostly by rolling instead of hammering is thespecial object of my invention.

My invention relates to that class of rolling the general character ofwhich is that the rolls have a portion of their surfaces lower thantheir working-surfaces. In operating them the bar or blank to be drawnis put through between the rolls from their delivering-side, they therebiting upon it at any convenient position, and by their action from suchpoint toward the end put through return the blank upon the same side ofthe rolls from which it was presented. My invention consists of a suitof rolling-dies, each pair of the suit respectively, and the severalpairs in succession, being of suitable form and proportion to the bar orblank to be first introduced to each other and to the resultant form, sothat the drawing and shaping shall be effected by successive passes, thesame being so constructed and operated as that the figure finallyproduced shall be of the form required.

Figure 1 of the accompanying drawing is a perspective view of my millfor rolling the heel ends of my scythes.

A is the driving-pulley, serving as a fly, and having on thedriving-shaft with it, beneath the housings of the rolls, a driving-gearworking into and driving the gear b, which is fast on the die-shaft orroll 0. The gear 1) works into and drives the gear d, which is fastupon' the roll 0. f and g constitute the pair of dies for the first passof the suit. h h constitute the dies for the second pass, and on therolls 0 and e at the ends thereof opposite to f and g, respectively,(but not seen in the drawing,) is a pair of dies similar to f and 9, butvarying in dimensions from f and g, as will hereafter appear by thedescription.

Figs. 2, 3, and 4 are respectively views of the pairs of dies as used inthis suit, Fig.2 being for the first pass, Fig. 3 forthe second pass,and Fig. 4 for the third pass, the letters of reference being in eachfigure the same, and the same as in Fig. 1, but 2 and j being the pairof dies before alluded to as not seen in the perspective drawing.

In Figs. 2 and 4 the full lines of the dies show their outlines inelevation, and the dotted lines nearest the full lines in said figuresrepresent the bottoms of the grooves. At

Fig. 5 are plans of the working-surfaces of the dies, the same beingrepresented as reduced to a plane.

1 1 are the grooves for the first pass; 2 2,

plain surface-dies for the second pass and 3 3,

the grooved dies for the third pass. k k are dotted lines, showing thedepth and form of those portions of the grooves in the bottom dies,which serve only as guides, by means of which the blank or bar is guidedproperly to the position to be acted upon by the grooved dies fordrawing and shaping the work. These guiding-grooves are of uniformbreadth and of uniform depth in nearly all their extent, which is nearlyaround the circumference of thelower die, excepting always that partwhich, in the revolution of the rolls, comes opposite to the upper die.This part constitutes the working-die, and is in form and extent everyway the converse of the upper die for all the purposes of drawing andshaping scytheshanks. The other dotted lines in Fig. 5, across thegrooves of the dies, represent the depth and form of the grooves atabout the points where they are located; and it will be observed thatthe dies for the first pass have theirporresponding parts deeper and alittle wider than the similarly-corresponding parts of the third pass.

This, it will be readily understood, is for the reason that, inconsequence of the action of the first and second passes, the parts uponwhich the third pass acts will have become smaller than at first, butthe distances between the similarly-corresponding parts in the directionof the circumference of the roll are greater than in the first pass.This difference should be equal, as near as may be, to the increasedlength of the piece in the'corresponding parts from the drawing of thesecond and third passes of the dies.

The pair of dies h h in Figs. 1 and 3, and 2 2 in Fig.5, have theirworking-surfaces of equal or nearly equal sizes concentric with andnearly parallel to the axes of the rolls, and at such distance therefromas will, between their surfaces, bring the piece to its properdimensionsin one direction, when the rolls are so adjusted thatthe dies for thefirst and third passes shall bring the piece to its proper dimensions inthe other direction.

In Fig. 1, at l, is shown a scythe with its heel end between one pair ofthe grooved dies, and in Figs. 2, 3, and 4 the dies are represented inabout the position at which they bite upon their work; but it should beunderstood that the operative, taking the scythe in his hand,presentsits heel end, the back being downward, in the long open grooveof the lower die; and when the upper die in its revolution is out of theway, he carries the scythe to such position as that the forward face ofthe upper die shall impinge upon the shoulder formed by the heel end ofthe blade, as seen in Fig. 2, when the die will move along the scytheuntil the two dies bite upon the blank part for the heel, when they willcarry forward the scythe until they pass off the extreme end thereof.The operative then presents the heel end flatwise between the rolls, soas to be caught between the dies h h at or near that part of the set ofthe blade nearest to the heel end thereof for the second pass. For thethird pass the scythe is introduced, in the same manner as in the firstpass, between the diesiandj, when a fourth pass may be and usually ismade by putting it again between the dies h h, as before.

It will be observed that in the particular form just described the twoflat sides of the finished form of the heel end of the scythe areparallel to each other; therefore, it is practical to make more than onepass in the same dies, especially when the manner of determining theposition upon the blank, in the direction of its length, shall besubstantially the same as described.

Having thus described my invention and its mode of operation, I do notwish to be understood as limiting myself to any of the particular modestherein set forth for guiding the blank or bar to the action of the diesor for determining the position at which the-dies shall be impressedupon the blank or bar, as these may be greatly varied.

I claim- A suit of roller-dies, made and operating substantially asdescribed.

In witness whereof I have hereunto set my hand.

HERVEY WATERS.

Witnesses:

J. B. GRosBY, W. B. GLEASON.

